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Proceedings Article

Cascaded plasmon resonances multi-material nanoparticle trimers for extreme field enhancement

[+] Author Affiliations
S. Toroghi, Chatdanai Lumdee, P. G. Kik

CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)

Proc. SPIE 8809, Plasmonics: Metallic Nanostructures and Their Optical Properties XI, 88091M (September 11, 2013); doi:10.1117/12.2024709
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From Conference Volume 8809

  • Plasmonics: Metallic Nanostructures and Their Optical Properties XI
  • Mark I. Stockman
  • San Diego, California, United States | August 25, 2013

abstract

Optical field enhancement in coupled plasmonic nanostructures has attracted significant attention because of field enhancement factors that significantly exceed those observed in isolated nanostructures. While previous studies demonstrated the existence of such cascaded field enhancement in coupled nanospheres with identical composition, this effect has not yet been studied in systems containing multiple materials. Here, we investigate the polarization-dependent optical response of multi-material trimer nanostructures composed of Au nanoparticles surrounded by two Ag nanoparticles as a function of nanoparticle size and inter-particle spacing. We observe field enhancement factors that are ten times larger than observed in isolated Au nanoparticles. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

S. Toroghi ; Chatdanai Lumdee and P. G. Kik
" Cascaded plasmon resonances multi-material nanoparticle trimers for extreme field enhancement ", Proc. SPIE 8809, Plasmonics: Metallic Nanostructures and Their Optical Properties XI, 88091M (September 11, 2013); doi:10.1117/12.2024709; http://dx.doi.org/10.1117/12.2024709


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